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tag: RUBY_1_3
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/************************************************
struct.c -
$Author$
$Date$
created at: Tue Mar 22 18:44:30 JST 1995
************************************************/
#include "ruby.h"
#ifdef USE_CWGUSI
#include <stdio.h>
#endif
VALUE rb_cStruct;
static VALUE
class_of(obj)
VALUE obj;
{
obj = CLASS_OF(obj);
if (FL_TEST(obj, FL_SINGLETON))
return RCLASS(obj)->super;
return obj;
}
static VALUE
rb_struct_s_members(obj)
VALUE obj;
{
VALUE member, ary;
VALUE *p, *pend;
member = rb_iv_get(obj, "__member__");
if (NIL_P(member)) {
rb_bug("non-initialized struct");
}
ary = rb_ary_new2(RARRAY(member)->len);
p = RARRAY(member)->ptr; pend = p + RARRAY(member)->len;
while (p < pend) {
rb_ary_push(ary, rb_str_new2(rb_id2name(FIX2INT(*p))));
p++;
}
return ary;
}
static VALUE
rb_struct_members(obj)
VALUE obj;
{
return rb_struct_s_members(class_of(obj));
}
VALUE
rb_struct_getmember(obj, id)
VALUE obj;
ID id;
{
VALUE member, slot;
int i;
member = rb_iv_get(class_of(obj), "__member__");
if (NIL_P(member)) {
rb_bug("non-initialized struct");
}
slot = INT2FIX(id);
for (i=0; i<RARRAY(member)->len; i++) {
if (RARRAY(member)->ptr[i] == slot) {
return RSTRUCT(obj)->ptr[i];
}
}
rb_raise(rb_eNameError, "%s is not struct member", rb_id2name(id));
return Qnil; /* not reached */
}
static VALUE
rb_struct_ref(obj)
VALUE obj;
{
return rb_struct_getmember(obj, rb_frame_last_func());
}
static VALUE rb_struct_ref0(obj) VALUE obj; {return RSTRUCT(obj)->ptr[0];}
static VALUE rb_struct_ref1(obj) VALUE obj; {return RSTRUCT(obj)->ptr[1];}
static VALUE rb_struct_ref2(obj) VALUE obj; {return RSTRUCT(obj)->ptr[2];}
static VALUE rb_struct_ref3(obj) VALUE obj; {return RSTRUCT(obj)->ptr[3];}
static VALUE rb_struct_ref4(obj) VALUE obj; {return RSTRUCT(obj)->ptr[4];}
static VALUE rb_struct_ref5(obj) VALUE obj; {return RSTRUCT(obj)->ptr[5];}
static VALUE rb_struct_ref6(obj) VALUE obj; {return RSTRUCT(obj)->ptr[6];}
static VALUE rb_struct_ref7(obj) VALUE obj; {return RSTRUCT(obj)->ptr[7];}
static VALUE rb_struct_ref8(obj) VALUE obj; {return RSTRUCT(obj)->ptr[8];}
static VALUE rb_struct_ref9(obj) VALUE obj; {return RSTRUCT(obj)->ptr[9];}
VALUE (*ref_func[10])() = {
rb_struct_ref0,
rb_struct_ref1,
rb_struct_ref2,
rb_struct_ref3,
rb_struct_ref4,
rb_struct_ref5,
rb_struct_ref6,
rb_struct_ref7,
rb_struct_ref8,
rb_struct_ref9,
};
static VALUE
rb_struct_set(obj, val)
VALUE obj, val;
{
VALUE member, slot;
int i;
member = rb_iv_get(class_of(obj), "__member__");
if (NIL_P(member)) {
rb_bug("non-initialized struct");
}
for (i=0; i<RARRAY(member)->len; i++) {
slot = RARRAY(member)->ptr[i];
if (rb_id_attrset(FIX2INT(slot)) == rb_frame_last_func()) {
return RSTRUCT(obj)->ptr[i] = val;
}
}
rb_raise(rb_eNameError, "not struct member");
return Qnil; /* not reached */
}
static VALUE
make_struct(name, member, klass)
VALUE name, member, klass;
{
VALUE nstr;
ID id;
int i;
if (NIL_P(name)) {
nstr = rb_class_new(klass);
}
else {
char *cname = STR2CSTR(name);
id = rb_intern(cname);
if (!rb_is_const_id(id)) {
rb_raise(rb_eNameError, "identifier %s needs to be constant", cname);
}
nstr = rb_define_class_under(klass, cname, klass);
}
rb_iv_set(nstr, "__size__", INT2FIX(RARRAY(member)->len));
rb_iv_set(nstr, "__member__", member);
rb_define_singleton_method(nstr, "new", rb_struct_alloc, -2);
rb_define_singleton_method(nstr, "[]", rb_struct_alloc, -2);
rb_define_singleton_method(nstr, "members", rb_struct_s_members, 0);
for (i=0; i< RARRAY(member)->len; i++) {
ID id = FIX2INT(RARRAY(member)->ptr[i]);
if (i<10) {
rb_define_method_id(nstr, id, ref_func[i], 0);
}
else {
rb_define_method_id(nstr, id, rb_struct_ref, 0);
}
rb_define_method_id(nstr, rb_id_attrset(id), rb_struct_set, 1);
}
return nstr;
}
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#define va_init_list(a,b) va_start(a,b)
#else
#include <varargs.h>
#define va_init_list(a,b) va_start(a)
#endif
VALUE
#ifdef HAVE_STDARG_PROTOTYPES
rb_struct_define(char *name, ...)
#else
rb_struct_define(name, va_alist)
char *name;
va_dcl
#endif
{
va_list ar;
VALUE nm, ary;
char *mem;
nm = rb_str_new2(name);
ary = rb_ary_new();
va_init_list(ar, name);
while (mem = va_arg(ar, char*)) {
ID slot = rb_intern(mem);
rb_ary_push(ary, INT2FIX(slot));
}
va_end(ar);
return make_struct(nm, ary, rb_cStruct);
}
static VALUE
rb_struct_s_def(argc, argv, klass)
int argc;
VALUE *argv;
{
VALUE name, rest;
int i;
VALUE st;
rb_scan_args(argc, argv, "1*", &name, &rest);
for (i=0; i<RARRAY(rest)->len; i++) {
ID id = rb_to_id(RARRAY(rest)->ptr[i]);
RARRAY(rest)->ptr[i] = INT2FIX(id);
}
st = make_struct(name, rest, klass);
rb_obj_call_init(st);
return st;
}
VALUE
rb_struct_alloc(klass, values)
VALUE klass, values;
{
VALUE size;
int n;
size = rb_iv_get(klass, "__size__");
n = FIX2INT(size);
if (n != RARRAY(values)->len) {
rb_raise(rb_eArgError, "struct size differs");
}
else {
NEWOBJ(st, struct RStruct);
OBJSETUP(st, klass, T_STRUCT);
st->len = 0; /* avoid GC crashing */
st->ptr = ALLOC_N(VALUE, n);
st->len = n;
MEMCPY(st->ptr, RARRAY(values)->ptr, VALUE, RARRAY(values)->len);
rb_obj_call_init((VALUE)st);
return (VALUE)st;
}
return Qnil; /* not reached */
}
VALUE
#ifdef HAVE_STDARG_PROTOTYPES
rb_struct_new(VALUE klass, ...)
#else
rb_struct_new(klass, va_alist)
VALUE klass;
va_dcl
#endif
{
VALUE val, mem;
int size, i;
va_list args;
val = rb_iv_get(klass, "__size__");
size = FIX2INT(val);
mem = rb_ary_new2(size);
va_init_list(args, klass);
for (i=0; i<size; i++) {
val = va_arg(args, VALUE);
rb_ary_store(mem, i, val);
}
va_end(args);
return rb_struct_alloc(klass, mem);
}
static VALUE
rb_struct_each(s)
VALUE s;
{
int i;
for (i=0; i<RSTRUCT(s)->len; i++) {
rb_yield(RSTRUCT(s)->ptr[i]);
}
return Qnil;
}
static VALUE
rb_struct_to_s(s)
VALUE s;
{
char *cname = rb_class2name(CLASS_OF(s));
char *buf = ALLOCA_N(char, strlen(cname) + 4);
sprintf(buf, "#<%s>", cname);
return rb_str_new2(buf);
}
static VALUE
inspect_struct(s)
VALUE s;
{
char *cname = rb_class2name(CLASS_OF(s));
VALUE str, member;
int i;
member = rb_iv_get(CLASS_OF(s), "__member__");
if (NIL_P(member)) {
rb_bug("non-initialized struct");
}
str = rb_str_new2("#<");
rb_str_cat(str, cname, strlen(cname));
rb_str_cat(str, " ", 1);
for (i=0; i<RSTRUCT(s)->len; i++) {
VALUE str2, slot;
char *p;
if (i > 0) {
rb_str_cat(str, ", ", 2);
}
slot = RARRAY(member)->ptr[i];
p = rb_id2name(FIX2INT(slot));
rb_str_cat(str, p, strlen(p));
rb_str_cat(str, "=", 1);
str2 = rb_inspect(RSTRUCT(s)->ptr[i]);
rb_str_cat(str, RSTRING(str2)->ptr, RSTRING(str2)->len);
}
rb_str_cat(str, ">", 1);
return str;
}
static VALUE
rb_struct_inspect(s)
VALUE s;
{
if (rb_inspecting_p(s)) {
char *cname = rb_class2name(CLASS_OF(s));
char *buf = ALLOCA_N(char, strlen(cname) + 8);
sprintf(buf, "#<%s:...>", cname);
return rb_str_new2(buf);
}
return rb_protect_inspect(inspect_struct, s, 0);
}
static VALUE
rb_struct_to_a(s)
VALUE s;
{
return rb_ary_new4(RSTRUCT(s)->len, RSTRUCT(s)->ptr);
}
static VALUE
rb_struct_clone(s)
VALUE s;
{
NEWOBJ(st, struct RStruct);
CLONESETUP(st, s);
st->len = 0; /* avoid GC crashing */
st->ptr = ALLOC_N(VALUE, RSTRUCT(s)->len);
st->len = RSTRUCT(s)->len;
MEMCPY(st->ptr, RSTRUCT(s)->ptr, VALUE, st->len);
return (VALUE)st;
}
static VALUE
rb_struct_aref_id(s, id)
VALUE s;
ID id;
{
VALUE member;
int i, len;
member = rb_iv_get(CLASS_OF(s), "__member__");
if (NIL_P(member)) {
rb_bug("non-initialized struct");
}
len = RARRAY(member)->len;
for (i=0; i<len; i++) {
if (FIX2UINT(RARRAY(member)->ptr[i]) == id) {
return RSTRUCT(s)->ptr[i];
}
}
rb_raise(rb_eNameError, "no member '%s' in struct", rb_id2name(id));
return Qnil; /* not reached */
}
VALUE
rb_struct_aref(s, idx)
VALUE s, idx;
{
int i;
if (TYPE(idx) == T_STRING) {
return rb_struct_aref_id(s, rb_to_id(idx));
}
i = NUM2INT(idx);
if (i < 0) i = RSTRUCT(s)->len + i;
if (i < 0)
rb_raise(rb_eIndexError, "offset %d too small for struct(size:%d)",
i, RSTRUCT(s)->len);
if (RSTRUCT(s)->len <= i)
rb_raise(rb_eIndexError, "offset %d too large for struct(size:%d)",
i, RSTRUCT(s)->len);
return RSTRUCT(s)->ptr[i];
}
static VALUE
rb_struct_aset_id(s, id, val)
VALUE s, val;
ID id;
{
VALUE member;
int i, len;
member = rb_iv_get(CLASS_OF(s), "__member__");
if (NIL_P(member)) {
rb_bug("non-initialized struct");
}
len = RARRAY(member)->len;
for (i=0; i<len; i++) {
if (FIX2UINT(RARRAY(member)->ptr[i]) == id) {
RSTRUCT(s)->ptr[i] = val;
return val;
}
}
rb_raise(rb_eNameError, "no member '%s' in struct", rb_id2name(id));
}
VALUE
rb_struct_aset(s, idx, val)
VALUE s, idx, val;
{
int i;
if (TYPE(idx) == T_STRING) {
return rb_struct_aset_id(s, rb_to_id(idx), val);
}
i = NUM2INT(idx);
if (i < 0) i = RSTRUCT(s)->len + i;
if (i < 0)
rb_raise(rb_eIndexError, "offset %d too small for struct(size:%d)",
i, RSTRUCT(s)->len);
if (RSTRUCT(s)->len <= i)
rb_raise(rb_eIndexError, "offset %d too large for struct(size:%d)",
i, RSTRUCT(s)->len);
return RSTRUCT(s)->ptr[i] = val;
}
static VALUE
rb_struct_equal(s, s2)
VALUE s, s2;
{
int i;
if (TYPE(s2) != T_STRUCT) return Qfalse;
if (CLASS_OF(s) != CLASS_OF(s2)) return Qfalse;
if (RSTRUCT(s)->len != RSTRUCT(s2)->len) {
rb_bug("inconsistent struct"); /* should never happen */
}
for (i=0; i<RSTRUCT(s)->len; i++) {
if (!rb_equal(RSTRUCT(s)->ptr[i], RSTRUCT(s2)->ptr[i])) return Qfalse;
}
return Qtrue;
}
static VALUE
rb_struct_eql(s, s2)
VALUE s, s2;
{
int i;
if (TYPE(s2) != T_STRUCT) return Qfalse;
if (CLASS_OF(s) != CLASS_OF(s2)) return Qfalse;
if (RSTRUCT(s)->len != RSTRUCT(s2)->len) {
rb_bug("inconsistent struct"); /* should never happen */
}
for (i=0; i<RSTRUCT(s)->len; i++) {
if (!rb_eql(RSTRUCT(s)->ptr[i], RSTRUCT(s2)->ptr[i])) return Qfalse;
}
return Qtrue;
}
static VALUE
rb_struct_hash(s)
VALUE s;
{
int i, h;
h = CLASS_OF(s);
for (i=0; i<RSTRUCT(s)->len; i++) {
h ^= rb_hash(RSTRUCT(s)->ptr[i]);
}
return INT2FIX(h);
}
void
Init_Struct()
{
rb_cStruct = rb_define_class("Struct", rb_cObject);
rb_include_module(rb_cStruct, rb_mEnumerable);
rb_define_singleton_method(rb_cStruct, "new", rb_struct_s_def, -1);
rb_define_method(rb_cStruct, "clone", rb_struct_clone, 0);
rb_define_method(rb_cStruct, "==", rb_struct_equal, 1);
rb_define_method(rb_cStruct, "eql?", rb_struct_eql, 1);
rb_define_method(rb_cStruct, "hash", rb_struct_hash, 0);
rb_define_method(rb_cStruct, "to_s", rb_struct_to_s, 0);
rb_define_method(rb_cStruct, "inspect", rb_struct_inspect, 0);
rb_define_method(rb_cStruct, "to_a", rb_struct_to_a, 0);
rb_define_method(rb_cStruct, "values", rb_struct_to_a, 0);
rb_define_method(rb_cStruct, "each", rb_struct_each, 0);
rb_define_method(rb_cStruct, "[]", rb_struct_aref, 1);
rb_define_method(rb_cStruct, "[]=", rb_struct_aset, 2);
rb_define_method(rb_cStruct, "members", rb_struct_members, 0);
}
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